package com.sky.service.impl;

import com.aliyuncs.http.HttpResponse;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /*
     * 统计指定时间的营业额
     * */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //用于存放begin——end范围内的日期
        List<LocalDate> dateList =new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            //计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的营业额
        List<Double> trunoverList=new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据（已完成的订单）
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //select sum(amount) from orders where order_time > beginTime and order_time < endTime and status = 5;
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            //判断数据是否为空
            turnover =turnover==null ? 0.0:turnover;
            trunoverList.add(turnover);
        }
        //封装数据并返回
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(trunoverList,","))
                .build();
    }
    /*
     * 统计指定时间的用户数据*/
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //用于存放begin——end范围内的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //新增用户
        List<Integer> newUserList=new ArrayList<>();
        //用户总数
        List<Integer> totalUserList=new ArrayList<>();
        
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);
            //总用户数量
            Integer totalUser = userMapper.countByMap(map);
            //新增用户数量
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }

        //封装数据并返回
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }
    /*
     * 统计指定时间的订单数据*/
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //用于存放begin——end范围内的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放没得的订单总数
        List<Integer> orderCountList=new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> validOrderCountList=new ArrayList<>();
        //遍历dateList集合，查询每天的有效订单数和订单总数
        for (LocalDate date : dateList) {
            //查询每天的订单总数 ：select count(id) from orders where order_time >? and order_time < ?;
            LocalDateTime beginTime = LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //查询每天的有效订单数:select count(id) from orders where order_time >? and order_time < ? and status =5;
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);


            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }
        //计算时间区间内的订单总数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        //计算订单完成率
        Double orderCompleteRate=0.0;
        if (totalOrderCount !=0){
            orderCompleteRate=validOrderCount.doubleValue()/totalOrderCount;

        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompleteRate)
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        //查询订单数据
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return  orderMapper.countByMap(map);
    }
    /*
     *销量排名top10
     * */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        //select od.name,sum(od.number) number form order_detail od,orders o where od.order_id=o.id and od.status=5 and order_time > ? and order_time <? group by od.name order by number desc limit 0,10;
        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        //封装VO返回数据
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }
    /*
    * 导出营业数据报表*/
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //1.查询数据库，获取营业数据--查询30天的营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于目标文件创建一个新的excel文件
            XSSFWorkbook excel=new XSSFWorkbook(in);

            //获取excel文件中的sheet页
            XSSFSheet sheet = excel.getSheet("sheet1");
            //获取sheet页中的数据--填充数据
            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间："+ dateBegin +"至"+dateEnd);
            //获得第3行
            XSSFRow row = sheet.getRow(3);
            //填充数据--营业额
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            //填充数据--订单完成率
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            //填充数据--新增用户数
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            //获得第4行
            row = sheet.getRow(4);
            //填充数据--有效订单数
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            //填充数据--平均客单价
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


            //填充数据---明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得第7+i行
                row = sheet.getRow(7 + i);
                //填充数据--日期、	营业额、	有效订单、订单完成率、平均客单价、新增用户数
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }

            //3.通过输出输出流将excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }



    }
}
